JA4 Fingerprint Directory

t12i0808ht_c9d1e06f98c4_ac6a06c2a0bd

Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.

What this fingerprint encodes

Transport

TCP

TLS version

TLS 1.2

Server name

no server name (IP literal)

Cipher suites offered

8

Extensions offered

8

ALPN

ht

Same tool, different options

These 1 other fingerprints share this one's JA4_c — the extension and signature-algorithm hash. A client that keeps its extension set constant while varying its cipher list produces exactly this pattern, which is what a scanner iterating cipher suites looks like. A JA3 cannot show you this: its single MD5 collapses ciphers and extensions together, so every variation looks like an unrelated client.

• t12i0808h2_c9d1e06f98c4_ac6a06c2a0bd

The hello it was computed from

Recovered because the proxy now stores the pre-hash JA3 string alongside the digest. Every number below came out of this client's ClientHello; anything we cannot name in the IANA registry is shown as its raw value rather than guessed at.

Version

TLS 1.2

Cipher suites 8

• TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_RSA_WITH_AES_128_GCM_SHA256
• TLS_RSA_WITH_AES_256_GCM_SHA384

Extensions 8

• supported_versions
• supported_groups
• signature_algorithms
• application_layer_protocol_negotiation
• extended_master_secret
• encrypt_then_mac
• renegotiation_info
• session_ticket

Named groups 2

• secp256r1
• x25519

771,49195-49196-49199-49200-52393-52392-156-157,43-10-13-16-23-22-65281-35,23-29,

Seen in live traffic

Connections

1

First seen

2026-08-23 15:10 UTC

Last seen

2026-08-23 15:10 UTC

Transport

TCP

This entry is an observation, not a policy decision. It is here because the edge saw it, not because anyone reviewed it, and it blocks nothing on its own. Only the curated tier drives classification and banning.